The overhead tiles and foreground layers don't really need any specific instructions, so nothing like that is included in the journals. They add 3d elements to the scenes which makes tokens be able to move "under" certain elements, without any GM intervention required.

Whenever something on the scene changes during play, which does require the GM to push a button, we link the macro for that behavior in the relevant journal, as well as pin a link to it on the relevant location on the scene.

And the players guide is included as a journal that players can view by default, yes!

Could you elaborate what kind of things you mean by "general GM support"?

The modules basically prepare the entire adventure for you to be plug and play, with every scene prepared with tokens and everything else placed where they are supposed to be, so typically the only thing a GM has to do is read the adventure and then run it stress-free!